11618379481 has 4 divisors (see below), whose sum is σ = 11709862912. Its totient is φ = 11526896052.

The previous prime is 11618379463. The next prime is 11618379491. The reversal of 11618379481 is 18497381611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18497381611 = 14431 ⋅1281781.

It is a cyclic number.

It is not a de Polignac number, because 11618379481 - 2¹⁵ = 11618346713 is a prime.

It is a super-2 number, since 2×11618379481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11618379431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45741525 + ... + 45741778.

It is an arithmetic number, because the mean of its divisors is an integer number (2927465728).

Almost surely, 2^11618379481 is an apocalyptic number.

It is an amenable number.

11618379481 is a deficient number, since it is larger than the sum of its proper divisors (91483431).

11618379481 is an equidigital number, since it uses as much as digits as its factorization.

11618379481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91483430.

The product of its digits is 290304, while the sum is 49.

The spelling of 11618379481 in words is "eleven billion, six hundred eighteen million, three hundred seventy-nine thousand, four hundred eighty-one".